Improvement in bolt-heading machines



Patented April8,1877.

A. F. JA C K S O N.

BOLT-READING MACHINE.

N o 18 9 Z2 6 I INVENTOR,

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ATTORNEYS W 1 T N s 3 ES 61 N.FE|ER& PNOTU-UTFOGRAPHER, WEHINQTDN. I). C.

UNITED STATES PATENT Enron IMPROVEMENT 1N BOLT-HEADING MACHINES.

' Specification forming part. of Letters Patent No. 189,226, dated April 3,1877 application filed December 16, 1876.

To all whom it may concern.- g

Be it known that I, AMBROSE F. JACKSON, of Minneapolis, in the county of Hennepin and State of Minnesota, have invented a new and valuable Improvement in Bolt-Heading Machines and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being bad to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of a front elevation of my bolt-heading machine, and Fig. 2 is a side elevation of the same. Fig. 3 is a plan view thereof, part sectional, and Figs. 4 and 5 are detail views.

This invention relates to machines for head ing bolts, and is an improvement on the machine described in Letters Patent granted to me, dated July 4, 1876, No. 179,563. The novelty consists in the novel construction and arrangement of the parts, as will be hereinafter more fully set forth.

In the annexed drawings, A designates the bed-piece of my apparatus, and B the pedestal or supporting-frame, which should be made sufficien tly strong to endure the jarring of the dies and the upset or spreader, hereinafter described. On the rear of said pedestal or supporting-frame B is secured an upright bifurcated standard, 0, which forms bearings c c for the driving-shaft D, operated by driving wheel E. Said shaft, as shown in detail in Fig. 4, is recessed near its middle portion, so as to form an eccentric crank-wrist, d, which, when in operation, islocated between the bearings c c. The said eccentric or crank-wrist d imparts a reciprocating motion to the yoke F F, which may be arranged on the shaft D in any suitable manner. The lower extreme ends of said yoke are pivotally connected to the rear ends of two curved horizontal arms, G, which are pivoted, at or near their middle parts, to blocks set into the top piece of said pedestal or frame B, as hereinafter described. Each of said curved arms is provided, on its inner face and to the rear of its pivotal point, with a projecting bracket or attaching-block, g, to which is pivotally secured a die, 9; and it is also provided at its outer end with a similar inwardly extending bracket or attachingblock, 9 to which is pivoted a die, 9 Saiddies are connected, by means of links g g, to pins g 9 which are fixed relativelyto said dies. This attachment retains said dies in such position as to form two contiguous sides of a bolt-head; but as said links are pivoted at both ends, the said dies are free to be alternately advanced and'retracted without departing from a right-line motion.

' To the front of bifurcated standard 0, overhanging the central part of the top piece B of main supporting-frame or pedestal B, I attach a vertical guide-plate, H, one face of which is provided with side-guidin g flanges h h, and the other face of which is cut away at h, as indicated in dotted lines in Fig. 1, to allow the passage and play of an eccentric stud or wristpin, 61, on the end of shaft I). Said eccentric stud or wrist-pin d sets into a recess in the rear of a slide, I, which is operated thereby so as to reciprocate vertically in guide-plate H, between flanges h h. Said slide carries on its lower end a pointed spreader or upset, J, which operates at each descent to spread the top of the bolt-blank, so as to form a head. The sides of the head are then shaped by the dies already described. The forward die g of one arm, G, operates simultaneously with the rear die g of the other arm, and as these dies rccede the others advance and operate.

Top piece B of pedestal B is constructed with a recess, 11, extendinginwardly from the middle of its front, to allow the bolt-blank to be inserted in a vertical .position under the spreader J and between the four dies already described. Said top piece is also recessed to receive the blocks of the clamping-jaws K K which operate as a vise to hold the said boltblank while it is being headed, as described. Jaw K is adjustable, and heldin position during the operation of the machine, by means of a set-screw, B or its equivalent, but jaw K is reciprocated'lengthwise by the following devices: L, Fig. 3, designates a crank-arm, which operates a shaft, M, journaled in lugs m m attached to one side of top piece B Said shaft is provided with an eccentric, M, and passes through a perforation in the end K (as shown in Fig. 5) of the jaw K By turning said crank outwardly the said jaw is caused to recedevfrom jaw K. By turning it inwardlythe opposite motion is produced. A s oue'of the operating-arms G, together with its dies and links, is pivotally attached to the top. of said sliding block, said jaw, in its movement, carries with it the arm and (lies attached thereto. It is evidentthat by adjusting jaw Kthe machine may be adapted to blanks of difl'erent sizes. a The motion of allthe parts'of my device is positive, and the reciprocatory movements of the vertical upset or spreader and the horizontal dies are all'produced by the same wheel and shaft.

What I claim as new, and desire to secure by Letters Patent, isy y 1. The combination, withthe shaft D, of'the yoke F F, the lower ends of'whichare pivoted to two horizontal arms, G,carrying the boltheadingdies, substantially as and for the purposesetforth.

2. The combination of shaft D, having crank d,with angular yoke F E ffaiid horizontal diecarrying arms G G, substantially as set forth. 3. In a bolt-heading machine, a shaft, provided with two eccentrics, arranged so as to operate both the. vertical spreader and the horri'zontal dies by direct and positive motion, substantially as set forth.

, 4,. Arm G, in combination with sliding jaw K "K dies g y links g j), and pin 9 substantially as set forth.

5. The combination of jaws G G, having the rear dies g and theforwa'rd dies g, with'links g yand pins 9 substantially as set forth.

In testimony that I claim the above I have hereunto subscribed myname in the presence of two witnesses.

AMBROSE F. JACKSON.

'Wltnesses:

ROBERT S. BRYANT, L. MJSTEWART. 

